Improvement in take-up mechanisms for looms



2SheetsSheetl.

T. W. HARRISON. TAKE-UP MECHANISM FOR LQOMS.

Patented. May 23,1876.

NAEI'ERSI FHOTO-UTHUGRAPHER. WASHINGTON D C rHoM AS 'wpm It his 0 N. F

'BOSTON, MASSACHUSETTS.

.i 'PRovEfM NT IN TAKE-UP-NII'ECHANISMS' FOR Looms.

Specification forming part of Letters To all whom itmag concern j Be it known that I, THOMAS W. HARRISON,

of- Boston, in-the county of Sufl'olk and State.

of Massachusetts, have in vented anv Improved Take-Up Mechanism for Looms, of which the' following is a full, clear, and exact description, reference. bein g had to theaccompanyin g drawings, making part of this specification, in wh1ch' Figure l'is a perspective view of, my imp of Fig. 2-.

The ordinary method of operating the takeup' roll of a loom at present in use is by means of a ratchet-wheel and pawl, the ratchet-wheel beingconnected witha train of gearing, by

whichmotion is communicated to the take-up roll. This device is, however, objectionable,

for thereason that when it becomes necessary to vary the amount of theta'ke-up of the fabric the ratchet-wheel has to be removed and replaced by another having coarser or finer teeth; or thevariation is eftected-by changing the train of-gearing connected with the ratchetwheel, causing in either case much inconvenience and loss of time.

My invention has for its purpose to over come these objections; and consists in operatalso consists in a device to be used in connection with my take-up'mechanism for the purpose of. stopping it in the event of the breakage of a shuttle-thread.

To enable others skilled in the art to understand and use my invention, I will proceed to describe the manner in which I have carried it out.

In the said drawings,Arepresents the takeup roll or cloth-beam of a loom. To one end .of this roll is secured a disk or wheel, B, pro- Patent No.

. December 22, 187 4.

177,830, dated May 23, 1876; application filed vided with a flange, a, which is embraced by 1 two pins, b a, projecting from a lever, d, which I ispivoted, at a point, 8, midway between the 1 two pins '1) c, to the outer end of a bent arm, e, pivotedupon the stud or shaft f, which supports the take-up roll A. The arm eand lever L d are held up in the position .seen in Figs. 1, 2, and 3 by a spring, g, and when the lever is depressed its inner. end is moved slightly on 1 the arm 6, whichcauses the pins b c to firmly clutch the flange'a, which is thus moved with the lever, partially rotating the take-up roll, as desired. On the release of the lever d the friction of the clutch-pins on the flange a is relieved, and the lever is returned to its original position by the spring 9 without moving the take-up roll. The clutch-lever d is curved or inclined at its outer end, and is depressed at the required. times by the forward movenient of a pin on the lay, or in any other suitable-.mannen h is a regulating'screw, which passes through a plate, t, and serves as a stop, to limit the amount of upward motion of the clutch-lever alas it is raised'b'y its spring,

and by simply turning this screw the movement of the lever and take-up roll may be adjusted with the utmost nicety, in order to vary the amount of the take-up of t the fabric, and thus increase or diminish the number of threads to the inch, as desired; and I am thus enabled to avoid the delay and inconvenience heretofore occasioned by removing a ratchet-wheel or gear and substituting another therefor, besides saving the cost of these extra wheels. The screw 7t is provided with a check-nut, 70,- by whichitis firmly held when properly adjusted. 1

In order to prevent the take-up roll from being rotated in a direction contrary to that of the arrow 9 by the tension of the cloth, I employ a retaining or holding device, consisting ofa lever, m, pivoted to an arm, n, and provided with clutch-pins 19 q, which embrace the flange a of the wheel B in a manner similar to thepins b c. The outer end of the lever m is kept in contact with a stationary stop,

r, by a spring, 8, and the arrangement of parts is such that the tension of the cloth upon the roll will cause the pinsp q to firmly clutch the flange a, and thus press the lever m against the stop r, which effectually preventsv any backward rotation of the roll. vWhen, however, the take-up roll is moved forward by the lever 01, as above described, the friction of the pins p g on the flange a is relieved, so as to allow of its free movement, as desired.

The above-described take-up mechanism is simpler, cheaper, and more easily adjusted than any other device heretofore used for this purpose.

Instead of the flange a being directly connected with the take-up roll, as shown, it may be connected with one of a trainof gears, by which motion is communicated to the take-up roll.

I will now describe the device by which the movement of the clutch-lever d is instantly stopped on the breakage of a shuttle-thread.

To the upper side of the arm 0 is secured a box or hearing, t, in which slides a bolt, u, against the rear end of which rests a flat spring, 22, the front end of the bolt being tapering or wedge-shaped. The rear end of the bolt u is forward by its spring 0), so that its tapering or wedgeshaped end will be interposed between the lever d and the regulating-screw h, and the lever is thus prevented from being raised by its sprin g g, to enable its pins to take a new hold on the flange a, and, consequently, the movement of thetakeqlp roll and the takeup of the fabric is stopped, as desired.

I do not claim, broadly, the clutch-lever d,

with its pins b c, as I am aware that this is a well-known mechanical device; but

What I do claim as my invention, and desire to secure by Letters-Patent, is

L T-he combination of the take-up roll A, the wheel B, with flange a, the lever d, pivoted to the bent arm 0, and provided with the pins 1) c, the shaft f, spring g, regulatingscrew h, and the lever m, pivoted to the arm n, and provided with clutch pins 11 q,- the spring '8, and stop 1', all substantially as and for the purposes herein set forth.

2-. In combination with the take-up mechanism, substantially as described, the stopbolt u, operating in the manner and for the purpose set forth.

Witness my'hand this 15th day of December, A. D. 1874.

THOMAS W. HARRISON.

In presence of P. E. .TESOHEMAGHER,. W. J. CAMBRIDGE. 

